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Kairos and Toggl Track, side by side
Toggl Track has a quick, well-made timer, and it is free for up to three people. The thing it does not do is the invoice.
Kairos and Toggl Track compared
| Feature | Kairos | Toggl Track |
|---|---|---|
| Price | $0.99 a month for Basic, $1.99 for Pro: founding prices, locked for life for the first 500 workspaces. Pro covers up to five members; nothing per seat. | $9 per user per month on Starter billed annually, $12 month to month. Every seat is paid. |
| Invoicing | Built in, on every plan. Unbilled hours and expenses become an invoice with your tax line, due date and logo. The client gets a PDF and a page to read and pay it, through your own Stripe account or your bank details. Monthly retainers draft themselves, and invoices sync to QuickBooks Online and Xero. | None. Billable rates and reports, then export a CSV or PDF and build the invoice in another tool. |
| Free tier | No free plan. Every workspace starts with 14 days of Pro, no card, and a sample workspace can be tried without signing up. | Free for up to three users, with the timer, calendar integrations and personal reports. |
| Monitoring | None. No screenshots, activity scores or location. Just the hours you track. | None by default. An optional desktop timeline can record which apps and sites were open; it stays on your own machine. |
| iPhone app | Yes, on Pro. Works offline; entries sync when you are back online. | Yes, with offline tracking. |
| Assistant and API | Yes. Claude connects to Kairos as a connector, signed in with OAuth, and can start, stop and log time and draft invoices. A token-scoped API does the same for scripts. | A REST API, and an MCP server for AI assistants. |
Toggl Track prices checked October 19, 2026, per user per month on annual billing, from public pricing pages and comparison guides. They are rounded and they change; Toggl Track’s own site has the current figures.
The difference, in plain terms
If you track time for your own curiosity, or to fill in a timesheet somewhere else, Toggl Track’s free plan may be all you need, and it is a pleasure to use. Its reports are good, its budgets warn you at 80%, and the timer is quick from the desktop, the phone and the browser.
Kairos exists for the person who tracks time in order to bill it. Every entry is priced at the project’s rate the moment it is tracked, so the invoice is already written by the time you want it: tick the unbilled entries, build it, and send the client a PDF and a page to pay from. There is no export step and no second tool. Internal time can be marked not billable, and it stays off the invoice.
On price, the comparison is between Toggl’s paid plans and Kairos’s. Basic is $0.99 a month for one person on the web. Pro is $1.99 and adds the iPhone app and up to five members, with no charge per seat. Both are founding prices, locked for life for the first 500 workspaces.
If you do not invoice from your hours, or you want a free timer for up to three people, Toggl Track is the better fit.
Fourteen days on us. Then a dollar.
Every workspace starts on a full Pro trial, no card. If it isn’t for you, nothing was charged.